US2651524A

US2651524A - Record changer head

Info

Publication number: US2651524A
Application number: US711450A
Authority: US
Inventors: Miller Walter; James L D Morrison
Original assignee: Individual
Current assignee: Individual
Priority date: 1946-11-21
Filing date: 1946-11-21
Publication date: 1953-09-08
Anticipated expiration: 1970-09-08

Description

Spt 8, 1953 w. MILLER ETAL RECORD CHANGER HEAD 4 Sheets-Sheet l File d Nov. 21, 1946 swam kw WALTER M/LLER JAMES L.D. MORRISON Sept. 8, 1953 w. MILLER ET AL RECORD CHANGER HEAD 4 Sheds-Sheet 3 Filed Nov. 21, 1946 WALTER MILLER JAMES L. D. MORRISON Sept. 8, 1953 w. MILLER ET AL 2,651,524

RECORD CHANGER HEAD Filed Nov. 21, 1946 4 Sheets-Sheet 4 Eli WW WALTER MILLER 7c 6761 JAMES L. 0. MORRISON Patented Sept. 8, 1953 RECORD CHANGER JHEAD Walter Miller and James L. D. Morrison,

Benton Harbor, Mich.

Application November 21, 1946, Serial-N 0. 711,450

3 Claims. 1

The present invention relates to automatic record changers, and more specifically to the record changer head for use in combination with an offset spindle type of record holder.

In record changer heads used heretofore in this combination, the lowermost record in the stack was ejected either by movement of the head in a straight'line radially of the record, or by a slide'in the head similarly moved to push the record off the'ledge on the spindle.

It has been discovered that a simpler and more reliable way of-ejecting the record is by forming an ejector ledge at one side above the normal supporting shoulder on the head and turning the head through a small arc, moving the shoulder from under the stack while causing the ledge to push the lowermost record and sliding it under theremainder of the stack to support it until the head is returned to its starting position when the stack is dropped to the normal supporting shoulder on the head.

The object of the present invention is to provide an oscillatable record changer head, having a shoulder for supportingone edge of a record and having a ledge slightly lower than the thickness of a record to one :sideabove said shoulder, and means for oscillatingsaid head to push the lowermost record and move the ledge under the remainderof the stack until the head is returned to its starting position to again support the stack on said shoulder.

A further object of the present inventionis to construct an oscillating changer head for supporting a stack of records atone edge thereof and having means for removing 'saidsupport and pushing the lowermost record in said stack while supporting therest of the stack during one turning stroke, and returning it to its starting position during the other or return stroke to support the rest of the stack normally at one edge until the following record changing operation.

A further object of the present invention, is to construct an oscillating record changer head which is adaptable when reversed for use either with 10" or 12" records, and which has resilient means for biasing-it toward its normal supporting position under one edge of a stack of records, and lost-motion connecting means between said head and the tone arm positioning means providing a stop for said tone arm at its position over the starting grooves in the record when said head is in its normal position.

A further object of the present invention is to construct an oscillating record changer head as above which however instead of reversing to 2 adapt it for use with 10" or 12" records is made with a single radially adjustable record supporting member so that it may be adjusted for use with either the 10 or 12" records without reversal.

Other objects and more specific objects will become apparent in the following detailed description of some specific forms of devices in accordance with this invention, having reference to the accompanying drawings wherein:

Figure 1 is a plan view of a specific form of record changer head made in accordance with the objects eneumerated above,

Figure 2 is a sectional view thereof,

Figure 3 is a plan view of the body portion of said head,

Figure 4 is a sectional view thereof taken on line 4-4 of Figure 3,

Figure 5 is-a part-sectional view thereof showing half of the view taken on line 5-5 of Figure 3,

Figure 6 is a blown-up view of a portion of Figure 1, I

Figure '7 is a plan view-of another form of head adjusted for use with 1-2" records,

Figure 8 is an elevational view of Figure '7, and

Figure .9 "is another plan View thereof with the single radially adjustable record supporting member extended for use with 10" records.

The record changer heads illustrated here are of the oscillating type. It is obvious, however, that the same principle of using a turntable-ledge over the supporting shoulder of the head to push the bottom record in a stack radially off the shoulder of the offset-spindle on the turntable, may be used in a rotatable type of record changer, which turns completelyaround during each cycle of operations.

The disclosure of Figures 1 and 2 is the same as that disclosed in our copending application filed October 1'7, 1946, .Serial No. 703,886, and of which this is a continuation in part.

The head His shown in more detail in Figures 3 to '5 in this application.

As already described in said application, the record changer head 41, shown for purposes of illustration, is a novel oscillating type for use in connection with an offset spindle type of record stack holder. In this form, the operation is accomplished as follows:

Thercycle is started by the pin I! being moved against the projection 18 on the sector I as a result of the needle 20 in the tone arm 2| run- .ning in the sound groove on the record 23 to the end of the recording thereon. This turns the gear sector i, as more fully described in our parent application Ser. No. 694,746, filed September 4, 1946, now Patent No. 2,487,771, so that the end 9 of the external gear 8 of the gear sector I engages the pinion 4, whereupon the gear sector 1 is turned until the pinion 4 runs off the other end H of the external gear 8, this ear in the meantime having been held in mesh with the pinion, in spite of its inclined pitch line, by the shroud M on the side of the pinion 4 pressing against the side of the external gear 8 pushing the gear sector out of its normal plane in which it is normally resiliently held by the spring l3. As the pinion 4 runs off the end H of the gear 8 the gear sector I springs back into its normal plane, bringing the end H] of the internal gear I in mesh with the pinion 4, thus starting the gear sector on its return oscillation stroke. The internal gear I is held in mesh with the pinion 4 throughout this return stroke by the shroud l4 pressing against the outer side of the external gear teeth 8 to move the gear sector 4 out of its normal plane in the reverse direction, in accordance with the inclination of the internal gear I.

When the pinion runs oiT the end 12 of the internal gear I, the cycle is completed and the gear sector I remains in this position, allowing the pinion 4 to continue rotating with the turntable shaft, until a new cycle is initiated as described above.

In the course of the cycle of operations, one of the functions performed during the oscillation of the gear sector I, as defined in the copending applications, is the oscillation of the head 41 thru an arc suflicient to push the lowermost recrd in the stack by means of the shoulder 41C oil the ledge 21A in the spindle 22, and clear of the cutaway ME in the lip 47D of head 41. The

detent or latch is resiliently held by spring 35 in the V-groove A, or 46B, depending on the size of records being used. As shown, the smaller or 10" records are being used, and the head is shown in its normal position.

As the gear sector I is turned during a portion of its oscillating stroke the projection 60C strikes the end 53A of pin ll and causes the shaft 19 to turn and with it move pin 34 to the end of the radius 243 where it strikes the projection 24A, fixed to the body of the head 41 in which the latch 35 is mounted. This turns the tone arm until the sleeve on which the tone arm is mounted is stopped by pin acting on a stop 50A on the sleeve. At this time the projection 600 has reached the end of its stroke and is ready to start on its return stroke.

During the movement of pin 34 as defined above, when the needle 20 in the tone arm 2| has reached a position over the starting groove in the record on the turntable, the pin 34 has reached the end of slot 41A in the body 41 whereupon the head is turned along with the tone arm during the remainder of the stroke, against the tension of the latch spring as the latch 35 travels up the V-groove 45A in the cam 46.

On the return stroke in this cycle of operations, therefore, after a new record has been dropped by the shoulder 470 on the head moving it off the ledge 27A on the oiTset spindle, the tone arm is brought back to its starting position by the latch spring 36 causing the latch 35 to slide down into the V-groove 45A. Thus, when the tone arm is later lowered, it comes down into the starting groove of the new record.

The head 41 therefore performs three func- 4 tions; it pushes the new record over the shoulder of the offset spindle, permitting it to drop past the radius 47E, and in combination with the latch and cam 46 it returns the tone arm to its proper starting position while moving itself back to its normal record supporting position on lip 47D, as well as permits the use of either 10" or 12 records selectively by allowing the head to be held in either one of the two positions corresponding to operation of the latch in either the V-groove 46A or the opposite V-groove 4613.

For manually starting the cycle of operation to change a record, it is merely necessary to use knob 42 by depressing it against the face of spring 44, whereupon the square socket in the knob will be pushed over the square end at top of shaft I9 while being slidably keyed to the casing of the head 41 by means of spline 42A, and the shaft and head assembly may then be turned until the pin l7 strikes the projection !8 on the gear sector assembly. This will start the operation of the cycle in the same manner as in the case Where the needle 20 operating in the sound groove of a record 23 reaches the end of said groove, as described above. When the cycle is started, the knob 42 is released, and the spring 44 moves it back into normal inoperative position with respect to the shaft 19.

Instead of the reversible type of head, such as head 47, having two sets of record supporting and sliding members for use with 10" and 12" records, a head El, having only one set of such members MD and 610 respectively, which are formed on a radially adjustable slide 61' in said head, may be used with either the 10" or 12" records. As shown in Figures '7 to 9, the head 67 is provided with a slide 67' held in either of the two adjusted positions by selectively moving either of the holes 68 or 69 over the pin 10, with the hinge pins 1 10 of slide 61' in the cor responding ends of slots Ill. Thus in the position shown in Figure 7 the head may be used with 12" records, while in that shown in Figure 9 it may be used with 10" records. The cam 46 used in connection with this type, of head need have only one V-groove 46A.

From the above illustrative forms of head and latch, it will be obvious that various modifications may be made Without departing from the spirit of the invention.

What is claimed is:

1. In a record changer having a spindle extending upwardly from a turntable in alignment with the axis thereof, a ledge carried by the spindle and extending laterally from one side thereof in vertically spaced relation to the turn: table and upon which the center portions of a stack of record disks is supported above the turntable, a tone arm adjacent the turntable to move about a vertical axis toward the axis of the turntable during the playing of a record and to shift vertically and move beyond the edge of the turntable upon completing the playing of the record, a head mounted above the tone arm to oscillate about the vertical axis, a slide carried by the head for adjustment radially to the vertical axis of the head for movement with the head in a horizontal arcuate path about said vertical axis, a record supporting lip carried by the slide for movement therewith from a position beneath the stack of records to a position to one side of the stack of records, means carried by the head and operatively connected to the tone arm for moving the lip to one side of the stack of records when the tone arm moves beyond the edge of the turntable, and a shoulder carried by the slide movement therewith toward the spindle to urge the bottommost record ofi of the ledge when the lip moves to one side of the stack of records.

2. The structure defined in claim 1 in which the head carries an upstanding pin and the slide is provided with longitudinally spaced openings for receiving the pin and holding the slide in adjusted position on the head.

3. The structure defined in claim 2 in which the head carries spaced parallel upwardly extending flanges having elongated longitudinally extending slots extending therethrough, and the slide carries laterally extending ears which project into the slots for slidably retaining the slide on the head.

WALTER MILLER. JAMES L. D. MORRISON.

References Cited in the file of this patent UNITED STATES PATENTS Number 5 1,469,152 2,090,746 2,352,331 2,394,539 2,395,026 10 2,484,775 2,536,432 2,561,792

1 Number Name Date Boumphrey Sept. 25, 1923 Compare Aug. 24, 1937 Leline June 27, 1944 Erwood et a1. Feb. 12, 1946 Weaver Feb. 19, 1946 Zandelin et al. Oct. 11, 1949 Faulkner Jan. 2, 1951 Emde July 24, 1951 FOREIGN PATENTS Country Date Great Britain Nov. 23, 1927 Great Britain Aug. 26, 1929